A tool to replay WAL files as a M/R job.
The WAL can be replayed for a set of tables or all tables,
and a timerange can be provided (in milliseconds).
The WAL is filtered to the passed set of tables and the output
can optionally be mapped to another set of tables.
WAL replay can also generate HFiles for later bulk importing,
in that case the WAL is replayed for a single table only.